Developer (.NET) – POS/Payment System, 5 YOE+ (Go Vap, Ho Chi Minh)

Develop and maintain payment- related features in POS systems (PAX/Clover, Authorize.Net, Cash, Tip, Tax, Refund).
Integrate and manage peripheral devices such as printers, card readers, retry queues, and connection monitoring.
Troubleshoot production issues, analyze logs, and provide timely hotfixes.Collaborate with QA, Product, and other departments to ensure system stability and efficiency.
(Optional) Participate in developing embedded or Linux- based POS applications using C++.
Build and optimize real- time synchronization features using SignalR / Socket.IO.Develop backend services using .NET Core / C, and optimize SQL Server queries for high performance.
Manage invoice operations: add/edit technicians, calculate taxes, discounts, and service fees.

Tech Stack (ATS Keywords)

Git, REST API
React, JavaScript (ES6) (preferred)
.NET Core 6/7, C
Docker, Redis, Nginx (preferred)
SignalR, Socket.IO, Real- time Communication
SQL Server, Stored Procedures, Indexing, Execution Plans

Responsibilities

Integrate POS devices such as PAX, Clover, Authorize.Net, printers, and card readers.
Collaborate closely with QA, Product, DevOps, and other cross- functional teams.
Develop real- time communication features using SignalR / Socket.IO.
Implement invoice logic including tax, discount, tips, service fee, and technician assignment.
Analyze logs, debug issues, and deliver production hotfixes when necessary.
Build and maintain backend services using .NET Core / C.
Optimize SQL Server performance (queries, stored procedures, indexing).

Required Qualifications

Solid understanding of API integration, distributed systems, and data flow between services.
Hands- on experience with real- time communication technologies such as Socket or SignalR.
Ability to read and comprehend technical documentation in English.
Strong expertise in SQL Server, including query optimization, indexing, and stored procedures.
Strong analytical thinking, sense of ownership, and a proactive problem- solving mindset.
5+ years of experience in backend development using .NET Core / C.
Submitting CV in English is must.

Benefits

Annual bonus and performance- based incentives.
Training and skill development opportunities.
Fully provided working equipment (laptop, devices).
Competitive salary: 25M – 40M VND (Gross), depending on experience.
Friendly, professional, and collaborative work environment.
Full Social, Health, and Unemployment Insurance.
12 paid annual leave days + 4 paid sick leave days per year.

Cập nhật gần nhất lúc: 2025-12-09 06:50:02